[Insight-developers] Changes to itkOptImageToImageMetric causing crashes

[Hans Johnson]

Stephen,

Those changes were made in order to fix the bug reported in
http://public.kitware.com/Bug/view.php?id=9139  to resolve a segmentation
fault that I was getting.  I tested that the original tests passed
regression tests with the change, and I added a test that fails without the
bug fix changes.  


I will not be able to work on this for the next 2 weeks, but if it is
determined that the changes need to be rolled back, then I need to know so
that I can figure out some other way to avoid the segmentation fault.

Hans
-- 
Hans J. Johnson, Ph.D.
Hans-johnson at uiowa.edu

278 GH
The University of Iowa
Iowa City, IA 52241
(319) 353 8587



From: Stephen Aylward <stephen.aylward at kitware.com>
Date: Fri, 26 Jun 2009 16:28:40 -0400
To: ITK <insight-developers at itk.org>
Subject: [Insight-developers] Changes to itkOptImageToImageMetric causing
crashes


Hi,

Registration code that use to work is now failing. 

When I back-out recent changes to the base image-to-image metric class, the
code starts working again.

The suspect changes are shown here:
http://public.kitware.com/cgi-bin/viewcvs.cgi/Code/Review/itkOptImageToImage
Metric.txx?root=Insight&r1=1.29&r2=1.30&sortby=date
http://public.kitware.com/cgi-bin/viewcvs.cgi/Code/Review/itkOptImageToImage
Metric.h?root=Insight&r1=1.22&r2=1.23&sortby=date

The failure I am getting is "joint pdf sums to zero."   It only happens when
I pass the samples to the metric.

Luis and I have encountered another group with different registration code
and that registration code has also recently started failing.  We are not
certain if the cause is the same.

I am traveling the next week, so if someone discovers the bug before me...
:)

Stephen

-- 
Stephen R. Aylward, Ph.D.
Director of Medical Imaging
Kitware, Inc. - North Carolina Office
http://www.kitware.com
(518) 371-3971 x300 (NY Line)
(919) 969-6990 x300 (NC Line)
stephen.aylward (Skype)


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